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SOBRE ESTE BLOG

Welcome to the System z Management Blog, where you can read the perspectives from System z experts. This Blog provides insights into the System z solution, as well as technical details about specific IBM products.

Note usage note number 2 where is states a restart of MVS is required:

2. Any subsystem name that you define for the NetView system can be used
only for the NetView system. If you choose a subsystem name that was
previously used, restart MVS before using the subsystem name. If the
NetView system is started as a job rather than as a task, the job name
must have the same first four characters as the subsystem interface
and startup procedure.